Influence of Al2O3·XH2O Crystallinities on the Morphology of AlOOH Whiskers

Meijuan Chen; Lan Xiang

doi:10.5101/nbe.v2i2.p121-125

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Article | Open Access

Influence of Al₂O₃·XH₂O Crystallinities on the Morphology of AlOOH Whiskers

Meijuan Chen, Lan Xiang

()

Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

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Abstract

γ-AlOOH whisker is one of the most popular precursors for the formation of Al₂O₃ whisker. In this paper, a facile hydrothermal method was developed to prepare γ-AlOOH whiskers, using hydrated alumina with different crystallinity as the hydrothermal precursors. Amorphous hydrated alumina precursors were prepared by mixing HCl and NaAlO₂ at room temperature, while crystalline hydrated alumina precursors were produced by precipitation of NaAlO₂ solution. γ-AlOOH whiskers with a length of 800-1500 nm and a diameter of 20-40 nm were formed by hydrothermal treatment (220 ℃, 8.0 h) of the mixing of two kinds of precursors. The experimental results indicated that the different dissolving rates of hydrated alumina precursors were one of the main reasons for the formation of γ-AlOOH whiskers with high aspect ratio.

Keywords

γ-AlOOH whiskers Crystallinity of precursors Hydrothermal technology

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Nano Biomedicine and Engineering

Volume 2 Issue 2,
June 2010

Pages 121-125

DOI: 10.5101/nbe.v2i2.p121-125

Cite this article:

Chen M, Xiang L. Influence of Al₂O₃·XH₂O Crystallinities on the Morphology of AlOOH Whiskers. Nano Biomedicine and Engineering, 2010, 2(2): 121-125. https://doi.org/10.5101/nbe.v2i2.p121-125